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<html>
	<head>
		<meta charset="utf-8" />
		<title></title>
	</head>
	<body>
		<header>头部</header>
		<nav>导航</nav>
		<section>定义文件中页眉</section>
		<aside>侧边栏</aside>
		<footer>脚部</footer>
		<article>一个完整独立的内容块</article>
	</body>
</html>
